wp-includes/formatting.php:5879Enqueues the important emoji-related styles.
function wp_enqueue_emoji_styles() { // Back-compat for plugins that disable functionality by unhooking this action. $action = is_admin() ? 'admin_print_styles' : 'wp_print_styles'; if ( ! has_action( $action, 'print_emoji_styles' ) ) { return; } remove_action( $action, 'print_emoji_styles' ); $emoji_styles = ' img.wp-smiley, img.emoji { display: inline !important; border: none !important; box-shadow: none !important; height: 1em !important; width: 1em !important; margin: 0 0.07em !important; vertical-align: -0.1em !important; background: none !important; padding: 0 !important; }'; $handle = 'wp-emoji-styles'; wp_register_style( $handle, false ); wp_add_inline_style( $handle, $emoji_styles ); wp_enqueue_style( $handle );}Introduced in 6.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/formatting.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.